目的　研究粘附分子 Ｅｃａｄｈｅｒｉｎｃａｔｅｎｉｎ（ Ｅｃａｄｃａｔ）复合体在涎腺腺样囊性癌（ａｄｅｎｏｉｄｃｙｓｔｉｃ ｃａｒｃｉｎｏｍ ａ； Ａ Ｃ Ｃ）中的表达，探讨 Ｅｃａｄｃａｔ 复合体与 Ａ Ｃ Ｃ分化、侵袭和转移之间的关系及其临床意义。方法　采用免疫组化技术检测５０ 例涎腺 Ａ Ｃ Ｃ标本和１０ 例正常涎腺组织中 Ｅｃａｄｈｅｒｉｎ（ Ｅｃａｄ）及其相关蛋白αｃａｔｅｎｉｎ（αｃａｔ）、βｃａｔｅｎｉｎ（βｃａｔ）的表达。结果　５０ 例病例中 Ｅｃａｄ、αｃａｔ 和βｃａｔ共同表达者有２９ 例（５８％ ），但在１８ 例有神经血管侵犯者，其原发灶 Ｅｃａｄｃａｔ复合体成份共同表达仅有７ 例（３９％ ）。结论　正常涎腺上皮组织中 Ｅｃａｄｃａｔ复合体成份呈强烈而稳定的表达，而在涎腺 Ａ Ｃ Ｃ 组织中其表达显著下调； Ｅｃａｄ／ｃａｔ复合体的表达水平与 Ａ Ｃ Ｃ神经血管侵犯呈负相关，但与病理分型无关； Ｅｃａｄ／ｃａｔ复合体的表达下降可能和涎腺组织恶变有关。 Objective To study the expression of adhesion molecule Ecadherincatenin (Ecadcat) complex in salivary adenoid cystic carcinoma (AcC) and to explore the relationship between Ecadcat complex and A Relationship between C-C differentiation, invasion and metastasis and its clinical significance. Methods 50 cases of salivary gland A C C specimens and 10 cases of normal salivary gland tissues were detected by immunohistochemistry. Ecadherin (Ecad) and its related proteins αcatenin (αcat), βcatenin cat) expression. Results 50 cases of E cad, α  cat and β  cat co-expression were 29 cases (58%), but in 18 cases of vascular invasion, the primary tumor E  cad  cat complex components together Expression was only 7 (39%). Conclusions The expression of Ecadcat complex in normal salivary gland epithelial tissue was strongly and stably expressed, while its expression was significantly downregulated in salivary gland A C C. The expression level of Ecad / cat complex was significantly higher than that of A C C Neurovascular invasion was negatively correlated, but not with the pathological type; E-cad / cat complex decreased expression may be related to malignant salivary gland tissue.